63145531 has 8 divisors (see below), whose sum is σ = 70379280. Its totient is φ = 56302848.

The previous prime is 63145469. The next prime is 63145549. The reversal of 63145531 is 13554136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63145531 - 2⁷ = 63145403 is a prime.

It is a super-2 number, since 2×63145531² = 7974716170543922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63145531.

It is not an unprimeable number, because it can be changed into a prime (63145931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97426 + ... + 98071.

It is an arithmetic number, because the mean of its divisors is an integer number (8797410).

Almost surely, 2^63145531 is an apocalyptic number.

63145531 is a deficient number, since it is larger than the sum of its proper divisors (7233749).

63145531 is a wasteful number, since it uses less digits than its factorization.

63145531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195533.

The product of its digits is 5400, while the sum is 28.

The square root of 63145531 is about 7946.4162362665. The cubic root of 63145531 is about 398.2118746807.

Adding to 63145531 its reverse (13554136), we get a palindrome (76699667).

The spelling of 63145531 in words is "sixty-three million, one hundred forty-five thousand, five hundred thirty-one".